Discover a handy way to describe reorderings and solve our anagram
in the process.
Learn how to use the Shuffles interactivity by running through these tutorial demonstrations.
Proofs that there are only seven frieze patterns involve complicated group theory. The symmetries of a cylinder provide an easier approach.
How many different transformations can you find made up from
combinations of R, S and their inverses? Can you be sure that you
have found them all?
An introduction to groups using transformations, following on from the October 2006 Stage 3 problems.
An article for students and teachers on symmetry and square dancing. What do the symmetries of the square have to do with a dos-e-dos or a swing? Find out more?